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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation S1G-T

Name: S1G-T
Brand: Taiwan Semiconductor Corporation
SKU: S1G-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1G-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: S1G-T.pdf

Description:: 1A, 400V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:7,809

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Product details

Overview

S1G-T from Taiwan Semiconductor is a 1A, 400V standard surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass-passivated junction, low forward voltage drop (max 1.1V at 1A), and high surge capability (30A IFSM). It serves as a primary AC/DC input rectifier in compact power supplies.

For engineers reviewing the S1G-T datasheet, S1G-T pinout, S1G-T application, or S1G-T equivalent, key selection criteria include repetitive peak reverse voltage (400V), thermal resistance (R_θJA = 85°C/W), junction capacitance (12pF), reverse recovery time (1500ns), and moisture sensitivity level (J-STD-020 Level 1).

Technical Context

This standard recovery rectifier uses a single-die silicon PN junction with glass passivation for reliability under thermal cycling and humidity exposure. Its 1500ns reverse recovery time and 12pF junction capacitance reflect trade-offs favoring cost-effective general-purpose switching over ultrafast or soft-recovery performance.

Designed for surface-mount assembly on FR-4 PCBs, the DO-214AC (SMA) package supports automated placement and reflow soldering per J-STD-002. Cathode polarity is marked by a visible band; leads are matte tin-plated and meet JESD201 Class 1A whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum non-repetitive reverse voltage the device blocks without breakdown
I_F	1 A - Continuous average forward current rating at T_A = 25°C
I_FSM	30 A - Peak non-repetitive surge current (8.3ms half-sine) the device withstands
V_F (max)	1.1 V - Maximum forward voltage drop at 1A and 25°C, directly impacting conduction loss
T_J max	150 °C - Maximum allowable junction temperature, limiting thermal design headroom
R_θJA	85 °C/W - Junction-to-ambient thermal resistance, used to calculate temperature rise under load
C_J	12 pF - Junction capacitance at 1MHz and 4V reverse bias, affecting high-frequency switching noise

Pinout & Package

DO-214AC (SMA) surface-mount package with axial lead configuration: anode and cathode terminals formed by two coplanar metallized ends of the molded body. Cathode identified by a distinct band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary; must handle full forward current and surge
Cathode	Forward current exit point / reverse voltage reference	Marked by band; connects to output capacitor or DC bus; referenced for reverse voltage rating

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable leakage current (<1µA @ 25°C) and long-term reliability in humid environments
J-STD-020 Level 1 moisture sensitivity	Allows unlimited floor life before reflow-no baking required prior to assembly
UL 94V-0 molding compound	Meets flame-retardancy requirements for safety-critical power supply enclosures
JESD201 Class 1A whisker resistance	Prevents tin whisker growth under thermal stress, ensuring long-term solder joint integrity
Matte tin-plated leads	Guarantees consistent wetting and intermetallic formation during lead-free reflow

Applications

AC/DC Adapter Input Rectification	DC-DC Converter Front-End
Use Scenario: Converts 90–264V AC mains to pulsating DC in compact wall adapters and USB-C PD chargers. IC Role / Device Role / Timing Role: Primary unidirectional power conversion element; conducts only during positive half-cycles. Use Value: 400V V_RRM provides 2× safety margin over 264V AC peak (373V), while 1.1V V_F limits conduction loss in space-constrained designs.	Use Scenario: Rectifies high-frequency AC from flyback or forward converter transformers operating at 65–130kHz. IC Role / Device Role / Timing Role: Output-side rectifier delivering regulated DC to downstream buck stages or loads. Use Value: 30A I_FSM handles startup surges; 12pF C_J minimizes capacitive coupling noise into sensitive control circuitry.
Industrial Power Supply Input Stage	LED Driver Bulk Rectification
Use Scenario: Used in DIN-rail mounted 24V/48V industrial PSUs accepting universal AC input. IC Role / Device Role / Timing Role: First-stage bridge or half-wave rectifier feeding bulk capacitor and PFC stage. Use Value: R_θJA = 85°C/W enables operation up to 70°C ambient without heatsinking when derated per Fig.1 curve.	Use Scenario: Rectifies AC line in non-isolated LED drivers for streetlights and commercial lighting. IC Role / Device Role / Timing Role: High-voltage input rectifier preceding constant-current regulation stage. Use Value: 150°C T_J_max and -55°C to +150°C storage range support outdoor deployment across wide temperature extremes.

AC/DC Adapter Input Rectification

DC-DC Converter Front-End

Use Scenario: Converts 90–264V AC mains to pulsating DC in compact wall adapters and USB-C PD chargers.

IC Role / Device Role / Timing Role: Primary unidirectional power conversion element; conducts only during positive half-cycles.

Use Value: 400V V_RRM provides 2× safety margin over 264V AC peak (373V), while 1.1V V_F limits conduction loss in space-constrained designs.

Use Scenario: Rectifies high-frequency AC from flyback or forward converter transformers operating at 65–130kHz.

IC Role / Device Role / Timing Role: Output-side rectifier delivering regulated DC to downstream buck stages or loads.

Use Value: 30A I_FSM handles startup surges; 12pF C_J minimizes capacitive coupling noise into sensitive control circuitry.

Industrial Power Supply Input Stage

LED Driver Bulk Rectification

Use Scenario: Used in DIN-rail mounted 24V/48V industrial PSUs accepting universal AC input.

IC Role / Device Role / Timing Role: First-stage bridge or half-wave rectifier feeding bulk capacitor and PFC stage.

Use Value: R_θJA = 85°C/W enables operation up to 70°C ambient without heatsinking when derated per Fig.1 curve.

Use Scenario: Rectifies AC line in non-isolated LED drivers for streetlights and commercial lighting.

IC Role / Device Role / Timing Role: High-voltage input rectifier preceding constant-current regulation stage.

Use Value: 150°C T_J_max and -55°C to +150°C storage range support outdoor deployment across wide temperature extremes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar standard rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	400V V_RRM, 1A I_F, but faster trr = 75ns; higher V_F = 1.3V typical	Better suited for high-frequency SMPS where reverse recovery loss dominates	Select S1G-T for cost-sensitive, lower-frequency (<100kHz) applications where conduction loss matters more
1N4007G	1000V V_RRM, same I_F, but through-hole DO-41 package; slower trr = 30µs	Used in legacy designs requiring axial-leaded replacement or higher voltage margin	Select S1G-T for new SMT designs needing smaller footprint, automated assembly, and tighter thermal management

Compared with STTH1R04 and 1N4007G, the S1G-T offers optimal balance of voltage rating, SMT compatibility, and thermal performance for mainstream 400V-class rectification-without over-specifying speed or voltage where unnecessary.

Availability

S1G-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial power supplies, and LED drivers requiring stable component supply, J-STD-020 Level 1 handling, and RoHS-compliant manufacturing.

Supply support for S1G-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power, automotive, and industrial markets since 1979.

The S1G-T belongs to TSC's S1x-T family of standard recovery rectifiers engineered for cost-effective, high-volume AC/DC front-end and DC-DC converter applications where robustness and manufacturability outweigh ultrafast switching demands.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1G-T?

The S1G-T has a V_RRM rating of 400 V, meaning it reliably blocks up to 400 volts of reverse voltage in repetitive operation. This value is laser-marked as "S1G" on the device body and is confirmed in the Absolute Maximum Ratings table of the E2102 datasheet. Exceeding this voltage risks avalanche breakdown and permanent damage to the S1G-T.

Does the S1G-T require baking before reflow soldering?

No, the S1G-T does not require baking prior to reflow. It is rated J-STD-020 Level 1 for moisture sensitivity, indicating unlimited floor life at ≤30°C/60% RH. This eliminates pre-bake steps in manufacturing, reducing process complexity and cost-making the S1G-T especially suitable for high-throughput SMT lines handling the S1G-T.

What is the forward voltage drop (V_F) of the S1G-T at rated current?

The S1G-T exhibits a maximum forward voltage drop of 1.1 V at I_F = 1 A and T_J = 25°C, per the Electrical Specifications table. This V_F value directly determines conduction losses in the application; for example, at 1A, the S1G-T dissipates up to 1.1W continuously, influencing thermal design decisions for the S1G-T.

Can the S1G-T replace the S1D-T or S1J-T in a design?

No-the S1G-T is not a direct replacement for S1D-T (200V) or S1J-T (600V), as each variant has a fixed, non-interchangeable V_RRM. Substituting the S1G-T for S1D-T risks overvoltage failure; using it instead of S1J-T forfeits 200V of reverse margin. Always match the exact "x" letter in S1x-T to the required voltage rating-S1G-T is specified only for 400V applications.

What package type does the S1G-T use, and is it compatible with standard SMA footprints?

The S1G-T uses the DO-214AC (SMA) package, with standardized dimensions and pad layout defined in TSC's Package Outline Dimensions drawing (Version E2102). It is fully compatible with industry-standard SMA footprints, including IPC-7351B naming conventions, enabling drop-in use in existing layouts designed for SMA rectifiers like the S1G-T.

S1G-T Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 150°C

S1G-T FAQ

1.How can I place an order for S1G-T through Aetrix?

Please submit a Request for Quotation (RFQ) for S1G-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for S1G-T reliable?

The price and inventory of S1G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1G-T is usually 5 days.

3.What payment methods are accepted for S1G-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1G-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1G-T?

S1G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1G-T order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for S1G-T?

For technical support, including S1G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1G-T requirements.

6.How does Aetrix verify that S1G-T is sourced from the original manufacturer or authorized distributors?

All S1G-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that S1G-T meets industry standards.

7.What is the process for return or replacement of S1G-T?

All S1G-T units undergo pre-shipment inspection (PSI). If there is an issue with S1G-T, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The S1G-T part is unused and in its original packaging.

Return procedure for S1G-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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